Since unkx80 posted a correct solution almost before my mouse button cooled off from posting the problem, I have taken the liberty of moving it here from the analysis page. Compared to the book there are a few differences in the order of the ko threats but they are all correct. --DaveSigaty
Seems to me that Black and White have six ko threats each.
Assuming Black takes the ko first...
(I think that White playing 8 instead of just continuing with 9 is one of the nice ideas in the problem. I know that I many times playing ko threats rather superficially without thinking of all alternatives. --DaveSigaty)
(I think that finding Black 3 is the other really nice point of this problem. For me it is natural to play Black at 9 in such shapes automatically when looking for ko threats. --DaveSigaty)
... looks like Black wins. Any better answers, comments or objections?